package com.zeng.gitxuexi.sync;
/*不安全取钱
两个人去银行取钱*/
public class UnsafeBank {
    public static void main(String[] args) {
        Account account = new Account(1000,"结婚钱");
        Drawing you = new Drawing(account, 50, "我");
        Drawing girlfriend = new Drawing(account, 100, "girlfriend");
        you.start();
        girlfriend.start();
    }
}

//账户
class Account{
    int money; //余额
    String name; //卡名

    public Account(int money, String name) {
        this.money = money;
        this.name = name;
    }
}

//银行 模拟取款
class Drawing extends  Thread{
    Account account; //账户
    //取了多少钱
    int drawingMoney;
    //现在手里有多少钱
    int nowMoney;
    public Drawing(Account account, int drawingMoney,String name){
        super(name);
        this.account = account;
        this.drawingMoney = drawingMoney;

    }
    //取钱
    @Override
    public  void run() {
        //锁的对象是变化的量，需要增删改的对象
        synchronized (account){
            //判断有没有钱
            if(account.money-drawingMoney<0){
                System.out.println(Thread.currentThread().getName()+"钱不够了，取不了了");
                return;
            }
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //卡内余额
            account.money = account.money-drawingMoney;
            //你手里的钱
            nowMoney = nowMoney+ drawingMoney;

            System.out.println(account.name+"余额为："+account.money);
            System.out.println(this.getName()+"手里的钱："+nowMoney);
        }
    }
}
